Special Prices for How to Apply for Authorization to Mail at Nonprofit Prices
PS Form 3624, Application to Mail at Nonprofit USPS Marketing Mail Prices.
Get a copy of PS Form 3624, Application to Mail at Nonprofit USPS Marketing Mail Prices. The form also is available from your postmaster or your Business Mail Entry Unit.
Fill out PS Form 3624. Lines 1-8 and Lines 10-17 are self-explanatory. For Line 9, check the category (ONLY ONE) under which you are applying.
Required documentation. You must submit some documentation with your application to support your claim for nonprofit prices:
Formative papers—e.g., articles of incorporation, constitution, or charter.
IRS letter of exemption from payment of federal income tax.
Other evidence of nonprofit status—e.g., a financial statement prepared by a responsible party such as a certified public accountant substantiating organization's nonprofit status (statement must include balance sheets, income statement, notes, etc.).
Some mailers provide additional supporting documentation:
List of the organization's activities during the past 12 months.
Financial statement showing receipts and expenditures for the past fiscal year, plus the budget for the current year.
Other documents of operation—e.g., the organization's bulletins, minutes of meetings, brochures.
Submit the completed form and supporting documentation to your postmaster or at the Business Mail Entry Unit. Applications may be submitted online by obtaining a logon and password at Business Customer Gateway at usps.com
Your application will be reviewed by the Postal Service. If there are any questions about the application or if additional supporting documentation is needed, a postal specialist will contact you directly. Hardcopy applications usually takes about two weeks for your application to be approved. Applying online can expedite the process.
You can mail your organization's material while the nonprofit application is pending. Until you receive nonprofit authorization, you must pay postage at the regular (higher) USPS Marketing Mail prices. Then, if your nonprofit application is approved, you can request a refund of the difference between the regular and nonprofit price.
To request a refund, complete PS Form 3533, Application for Refund of Fees, Products and Withdrawal of Customer Accounts. The form also is available from your postmaster or your Business Mail Entry Unit.
Submit PS Form 3533 with a copy of your dated nonprofit application and copies of your postage statements. Be sure to keep copies of your postage statements to expedite the refund process. It takes about two weeks to receive your refund check.

Once you have been approved to mail at nonprofit privileges, in order to keep that authorization, you must make a nonprofit mailing at least once during a two-year period. Otherwise, your authorization could be revoked.